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A kind of iron powder core inductor and preparation method thereof

An iron powder core and inductor technology, applied in the manufacture of inductors/transformers/magnets, inductors, fixed inductors, etc., can solve the problems of unfavorable miniaturization, low magnetic permeability, high production cost, and achieve high cost performance and high temperature resistance. Heat aging, easy cutting effect

Active Publication Date: 2017-12-29
SHENZHEN GUDIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the technical problems of low magnetic permeability, high production cost, and unfavorable miniaturization of the above-mentioned iron powder core, the present invention provides an iron powder core inductor with high temperature resistance, low loss, high magnetic permeability and long service life. and its preparation method

Method used

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  • A kind of iron powder core inductor and preparation method thereof
  • A kind of iron powder core inductor and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Take mixed metal powder according to the mass percentage content of iron 85%, chromium 8%, zinc 7%, and take by weighing acetone and phosphoric acid according to the mass ratio of mixed metal powder: acetone: phosphoric acid=1: 0.5: 0.3, will The above powder is uniformly dissolved in acetone, and phosphoric acid is added to mix and stir it, and the alloy phosphoric acid solution is obtained after fully stirring for 3 hours under closed conditions;

[0033] 2) Put the alloy phosphoric acid solution into an oven and dry it at 100°C to obtain alloy powder with insulating surface;

[0034] 3) According to the mass ratio of alloy powder: iron oxide: magnesium oxide: chromium oxide = 1: 0.08: 0.03: 0.03, add iron oxide, magnesium oxide and chromium oxide powder to the alloy powder, and fully dry mix them Obtain composite inorganic powder;

[0035] 4) According to the mass ratio of composite inorganic powder: solvent: binder: plasticizer: dispersant = 1: 0.4: 0.2: 0.01: 0...

Embodiment 2

[0039] 1) Take mixed metal powder according to the mass percentage content of iron 80%, chromium 5%, zinc 15%, and take by weighing acetone and phosphoric acid according to the mass ratio of mixed metal powder: acetone: phosphoric acid=1: 0.5: 0.3, will The above powder is uniformly dissolved in acetone, and phosphoric acid is added to mix and stir it, and the alloy phosphoric acid solution is obtained after fully stirring for 3 hours under closed conditions;

[0040] 2) Put the alloy phosphoric acid solution into an oven and dry it at 100°C to obtain alloy powder with insulating surface;

[0041] 3) According to the mass ratio of alloy powder: iron oxide: magnesium oxide: chromium oxide = 1:0.08:0.03:0.03, add iron oxide, magnesium oxide and chromium oxide powder to the alloy powder, and fully dry mix them Obtain composite inorganic powder;

[0042] 4) According to the mass ratio of composite inorganic powder: solvent: binder: plasticizer: dispersant = 1: 0.4: 0.2: 0.01: 0.0...

Embodiment 3

[0046] 1) Take mixed metal powder according to the mass percentage content of iron 80%, chromium 15%, zinc 5%, and take by weighing acetone and phosphoric acid according to the mass ratio of mixed metal powder: acetone: phosphoric acid=1: 0.5: 0.3, will The above powder is uniformly dissolved in acetone, and phosphoric acid is added to mix and stir it, and the alloy phosphoric acid solution is obtained after fully stirring for 3 hours under closed conditions;

[0047] 2) Put the alloy phosphoric acid solution into an oven and dry it at 100°C to obtain alloy powder with insulating surface;

[0048] 3) According to the mass ratio of alloy powder: iron oxide: magnesium oxide: chromium oxide = 1:0.08:0.03:0.03, add iron oxide, magnesium oxide and chromium oxide powder to the alloy powder, and fully dry mix them Obtain composite inorganic powder;

[0049] 4) According to the mass ratio of composite inorganic powder: solvent: binder: plasticizer: dispersant = 1: 0.4: 0.2: 0.01: 0.0...

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Abstract

The invention provides a powdered iron core inductor and a preparation method therefor. The raw materials of the powdered iron core comprise the following metal components in percentage by mass: 80-90% of iron, 5-15% of chromium, and 5-15% of zinc; all the metal components are elementary powder; the powdered iron core inductor is prepared by the steps of uniformly dissolving the metal powder into acetone, and adding phosphoric acid to the solution to carry out surface insulating processing, and drying the solution to obtain insulating alloy powder; adding iron oxide, magnesium oxide and chromium oxide into the insulating alloy powder, and dry-mixing the mixture to obtain composite inorganic powder; preparing the composite inorganic powder into composite paste, and preparing a formed block by wet process curtain coating and preparing an inner circuit through copper paste printing; and finally carrying out drying, cutting, glue removing, sintering, chamfering, end sealing by the copper paste, end sintering, and electroplating on the block to obtain the powdered iron core. The powdered iron core is resistant to high temperatures, low in loss, high in magnetic conductivity and relatively long in service life, so that the production cost is lowered, large-scale stamping equipment is not required, and the miniaturization of the electronic components and parts can be promoted.

Description

technical field [0001] The invention relates to the production field of electronic components, in particular to an iron powder core inductor with high temperature resistance, low loss, high magnetic permeability and inductance value and a preparation method thereof. Background technique [0002] Magnetic powder core is a kind of soft magnetic material made by mixing ferromagnetic powder particles and insulating medium. Since the ferromagnetic particles have a small diameter and are separated by non-magnetic electrical insulating film substances, they have the ability to isolate eddy currents and powder core distribution. The characteristics of uniformity and no skin phenomenon, and the change of magnetic permeability with frequency are also relatively stable, which is suitable for the production of high-frequency inductors. Iron powder core is a kind of commonly used soft magnetic powder core. Compared with other materials, it has the characteristics of high saturation magne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F17/00H01F1/09H01F1/24H01F41/02
CPCH01F1/09H01F1/24H01F17/0013H01F41/0246
Inventor 梁晓斌潘锴
Owner SHENZHEN GUDIAN ELECTRONICS